Machine-gun.



v. v. msovsxv.

MACHINE GUN APPLICATION FILED APR. 10. I918.

Patented Apr. 1,1919.

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VICTOR V. DIBOVSKY, OF KINGSWAY, LONDON, ENGLAND.

MACHINE-GUN.

Application filed April 10, 1918.

To all whom it may concern:

Be it known that I, VICTOR VLADIMIRO- vrror-r Dmovsxr, a Russiansubject, captain of the Russian naval general stafi, and whosepost-office address is Canada House, Kingsway, London England, haveinvented certain new and useful Improvements in Machine- Guns, of whichthe following is a specification.

This invention relates to machine-guns.

The rate of fire of an automatic gun can be increased by increasing therate of reciprocation of the breech-block and other parts cooperatingtherewith. If the said rate of reciprocation is increased, disadvantagesarise because the liability of the mechanism to jam is increased. It isto a device in the extractor-mechanism of a highspeed machine-gun, tocounteract this disadvantage, that the present invention relates.

In a gun provided with an extractor moving with the lock-casing andupheld by guides during the first portion of the rearward movement ofthe lock, and having to pass clear from those guides and descend acrossthe face of the lock-casing during an interval in which the, lockcompletes its rearward movement and commences its return movement, thereis a possibility, when the gun is firing rapidly, that if the descent ofthe extractor be left to the action of gravity alone it will notdescend-fast enough to prevent it from being caught against. theguide-ends in the return movement of the lock. Accordingly the presentinventor having found the extractor-controlling devices in existingweapons ineflicient has devised an improved device as follows :Heprovides a spring always in compression (or tension) resting at one endagainst a portion of the lock or its casing and at the other end againsta projection from the ex tractor in order to accelerate the descent ofthe extractor. By this means the rate of descent of the extractor withthe cartridge carried by it is increased, and the extractor will be nolonger liable to be caught by the returning lock and jammed against theguide-ends; moreover the spring will cushion or buffer the extractor onthe upstroke of the latter.

This invention therefore comprises, in a gun provided with an extractormoving with the lock-casing and upheld by guides from which it passesclear when it is neces- Specification of Letters Patent.

Patented Apr. 1, 1919;

Serial No. 227,777.

sary that it should descend toward the cartridge-belt, the combinationwith that extractor of a spring that is always in compression ortension), is carried on the lockcasmg and is adapted to accelerate thedescent of the extractor and to cushion the upstroke of the extractor.In a preferred construction according to this invention, the extractoris formed or fitted with a projection passing through a slot in thefront wall of the lock-casing and downwardly acted on by a spring incompression, situated inside the lock-casing.

The invention is hereinafter described in its application to a Vickersgun of a type already wellknown and firing small-arm ammunition.

The accompanying drawing is an elevation, partly in section, of the rearend of the casing of a gun showing one construction of the improvedguiding device by which the descent of the extractor during its rearward motion with the lock is insured.

Referring to the drawing, EX is an extractor arranged to slidevertically up and down on the forward face of the lock-casing LG, and Gis one of two stationary guides or cams attached to the cheek-plates ofthe gun-casing at each side of the lock. Projections can extend fromeach side of the extractor and ride upon the top of the guides G duringthe rearward movement of the lock-casing until they pass the rear end ofthe guide G. In order to insure that the extractor shall descend smartlywhen it is clear of the guide G, a projection EX is provided on the rearside of the extractor extending through a slot SL in the lock and havinga pin EP upon it around which is coiled the lower end of a helicalspring ES always in compression between the projection EX and a portionof the interior of the lock-casing above it. The spring ES when theextractor rises, will buffer it so as to reduce the violence of theshock with which the upstroke of the extractor will be checked.

Though the spring ES is shown and described as a helical spring incompression, other forms of spring might be used instead. For instance ahelical spring in tension might be placed under the projection EX- andarranged to pull it downward, or other suitable forms might be usedinstead of helical springs, this invention comprising the employment ofa spring carried by and traveling with the lock-casing LC, always readyto act for the purpose of promptly carrying down the extractor EX duringthe recoil movement thereof as soon as it has cleared the rear ends ofthe guides G, and of checking the extractor during the upward movementthereof. 7 i What I claim as my invention and desire j to secure byLetters Patent is 1. In a machinegun, the combination wlth a lockcasing, an extractor carried thereby, and .means for guiding said ex- 1tractor in. the direction of the length of the Ccpiesof this patent maybe obtained for gum said extractor being movable relative to the casingwhen disengaged from the guiding means, of a spring carrie'diby the'lock casing and cooperating with the extractor to accelerate movementthereof relagun, the extractor being movable transversely of the gunwhen disengaged from the guiding means, of a spring cooperating with theextractor to accelerate movement thereof relative to the casing in oned1rection and decelerate its movement in the opposite direction. 3. In amachine gun, the combination with a lock casing adapted to reciprocatein the direction of the length of the gun, 7 an extractor mounted on thefront of said casing and means for guiding the extractor duringreciprocations' of the casing, the extractor being movable transverselyof the gun when it is disengaged from said guiding 'means, of a springarranged within the casing and adapted to accelerate .such transversemovement of the extractor.

4L. Ina machine gun, the combination with a lock casing adapted toreciprocate in the direction of the length of the gun, an

extractor carriedby-the casing,.and means for guiding the extractorduring such reciprocation of the" casing, the extractor being movabletransversely 0f the gun when disengaged irorn said guiding means, of aprojection on theextractor extending through a' slot in the casing, anda spring arranged within thecasing and cooperating with said projectionon the extractor to accelerate transverse movement thereof.

In testimonywhereof I affix my signature.

, v. v. DIBOVSKY.

five cents each, by addressing the" Commissioner 0!. Patents,Washington, 11.0." H r V

